Texas Instruments TI-83 PLUS - Manual (Page 545)

TI-83 Plus Activities 542
The Quadratic Formula
Converting to a Fraction
You can show the solution as a fraction.
1. Press  to display the
MATH
menu.
2. Press 1 to select 1: 4 Frac from the
MATH
menu.
When you press 1 , Ans 4 Frac is displayed on the
home screen. Ans is a variable that contains the
last calculated answer.
3. Press Í to convert the result to a fraction.